[ 51.746279] BUG: Bad rss-counter state mm:00000000c256c9f7 type:MM_FILEPAGES val:33 [ 51.747526] BUG: Bad rss-counter state mm:00000000c256c9f7 type:MM_ANONPAGES val:22 [ 51.782846] ================================================================== [ 51.783594] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.784374] Read of size 8 at addr ffff88800e0d2ed8 by task sshd/225 [ 51.785035] [ 51.785217] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.785957] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.786863] Call Trace: [ 51.787127] [ 51.787406] dump_stack_lvl+0x91/0xf0 [ 51.787845] print_report+0xcc/0x620 [ 51.788257] ? __virt_addr_valid+0x102/0x340 [ 51.788717] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.789231] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.789787] kasan_report+0xbe/0xf0 [ 51.790181] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.790698] vma_interval_tree_remove+0xc75/0xec0 [ 51.791196] vma_prepare+0xc54/0x11a0 [ 51.791593] __split_vma+0x5af/0x950 [ 51.791983] ? __pfx___split_vma+0x10/0x10 [ 51.792422] ? find_held_lock+0x2c/0x110 [ 51.792856] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.793324] ? lock_is_held_type+0x9f/0x120 [ 51.793800] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.794307] ? mtree_range_walk+0x632/0x900 [ 51.794761] ? mas_walk+0x5c7/0x7c0 [ 51.795153] do_vmi_munmap+0x1f1/0x2b0 [ 51.795562] mmap_region+0x1f9/0x2660 [ 51.795963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.796385] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.796974] ? __pfx_lock_acquire+0x10/0x10 [ 51.797416] ? __pfx_mmap_region+0x10/0x10 [ 51.797857] ? security_mmap_addr+0x7d/0xa0 [ 51.798293] ? get_unmapped_area+0x1f5/0x3f0 [ 51.798742] do_mmap+0x854/0xf00 [ 51.799108] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.799519] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.799984] ksys_mmap_pgoff+0x3af/0x500 [ 51.800402] do_syscall_64+0x3f/0x90 [ 51.800795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.801321] RIP: 0033:0x7feab6e92d82 [ 51.801709] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 51.803474] RSP: 002b:00007fff491bc798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.804225] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feab6e92d82 [ 51.804915] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feab62cc000 [ 51.805624] RBP: 00007feab62cc000 R08: 0000000000000009 R09: 0000000000001000 [ 51.806323] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556aab349ec0 [ 51.807026] R13: 00007fff491bc7b0 R14: 00007fff491bc7e0 R15: 00007fff491bcb40 [ 51.807741] [ 51.807985] [ 51.808167] Allocated by task 212: [ 51.808519] kasan_save_stack+0x22/0x50 [ 51.808935] kasan_set_track+0x25/0x30 [ 51.809342] __kasan_slab_alloc+0x59/0x70 [ 51.809773] kmem_cache_alloc+0x16b/0x370 [ 51.810201] vm_area_dup+0x20/0x160 [ 51.810594] __split_vma+0x170/0x950 [ 51.810983] split_vma+0xc6/0x110 [ 51.811346] mprotect_fixup+0x8d2/0xb30 [ 51.811805] do_mprotect_pkey+0x87e/0xd40 [ 51.812241] __x64_sys_mprotect+0x78/0xc0 [ 51.812681] do_syscall_64+0x3f/0x90 [ 51.813068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.813613] [ 51.813791] Freed by task 212: [ 51.814111] kasan_save_stack+0x22/0x50 [ 51.814526] kasan_set_track+0x25/0x30 [ 51.814933] kasan_save_free_info+0x2b/0x50 [ 51.815373] __kasan_slab_free+0x10a/0x190 [ 51.815808] kmem_cache_free+0x10d/0x4d0 [ 51.816222] rcu_core+0x8c8/0x2860 [ 51.816589] __do_softirq+0x1b7/0x7d4 [ 51.816974] [ 51.817148] Last potentially related work creation: [ 51.817637] kasan_save_stack+0x22/0x50 [ 51.818051] __kasan_record_aux_stack+0x8e/0xa0 [ 51.818523] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.819046] remove_vma+0x139/0x170 [ 51.819413] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.819872] do_vmi_munmap+0x1f1/0x2b0 [ 51.820263] __vm_munmap+0x138/0x3a0 [ 51.820646] __x64_sys_munmap+0x59/0x80 [ 51.821057] do_syscall_64+0x3f/0x90 [ 51.821445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.821993] [ 51.822167] The buggy address belongs to the object at ffff88800e0d2e80 [ 51.822167] which belongs to the cache vm_area_struct of size 168 [ 51.823384] The buggy address is located 88 bytes inside of [ 51.823384] freed 168-byte region [ffff88800e0d2e80, ffff88800e0d2f28) [ 51.824545] [ 51.824719] The buggy address belongs to the physical page: [ 51.825264] page:0000000044c77c0a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0d2 [ 51.826165] memcg:ffff88800eb35b01 [ 51.826517] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 51.827093] page_type: 0xffffffff() [ 51.827477] raw: 0100000000000200 ffff88800879fc80 ffffea0000356080 0000000000000009 [ 51.828239] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb35b01 [ 51.828993] page dumped because: kasan: bad access detected [ 51.829540] [ 51.829718] Memory state around the buggy address: [ 51.830194] ffff88800e0d2d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.830884] ffff88800e0d2e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 51.831582] >ffff88800e0d2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.832272] ^ [ 51.832860] ffff88800e0d2f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 51.833567] ffff88800e0d2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 51.834258] ================================================================== [ 51.835099] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 53.588181] BUG: Bad rss-counter state mm:0000000063846e7f type:MM_FILEPAGES val:33 [ 53.589366] BUG: Bad rss-counter state mm:0000000063846e7f type:MM_ANONPAGES val:22 [ 54.087245] BUG: Bad rss-counter state mm:00000000768c387b type:MM_FILEPAGES val:33 [ 54.087976] BUG: Bad rss-counter state mm:00000000768c387b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60344' (ECDSA) to the list of known hosts. 2023/06/20 00:36:12 fuzzer started 2023/06/20 00:36:12 dialing manager at localhost:44161 2023/06/20 00:36:12 checking machine... 2023/06/20 00:36:12 checking revisions... [ 54.824340] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:36:12 testing simple program... [ 54.875635] cgroup: Unknown subsys name 'net' [ 54.928843] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:35:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800fd951c0 RSI=ffffffff83c20834 RDI=ffff88800ca77140 RBP=ffff88800883d080 RSP=ffff88801583f9a0 R8 =0000000000000004 R9 =000000000001762e R10=000000000001762e R11=0000000000000001 R12=ffff8880164b9e50 R13=ffff88800ca77140 R14=ffff88801583fa70 R15=0000000000000053 RIP=ffffffff83c20834 RFL=00000293 [--S-A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe85cc19900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fe85c039bb0 CR3=000000000ca80000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=906fa37b339d85e500000000000ae988 XMM05=d13e5866ac3870a700000000001348a8 XMM06=ae9b264101391a5b0000000000133328 XMM07=fb795ef6d65770560000000000123bf8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000080 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff856cd420 RBP=ffff88801cc37ac0 RSP=ffff88801cc37aa0 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff888008f76500 R13=00000000ffffffff R14=ffff8880146c1b40 R15=ffffffff8366cd3c RIP=ffffffff812d8e1e RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0071b1c900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fff86038000 CR3=000000000d5ac000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000